I have the same problem. Laptop is toshiba p100-429. I upgraded to v3.80 bios, the DSDT supplied by the system now needs no patching to get it to the same state as the guide gets you to, but there is still no sound.

My dmesg|grep ACPI :

[    0.000000]  BIOS-e820: 000000003fe90000 - 000000003fe9c000 (ACPI data)
[    0.000000]  BIOS-e820: 000000003fe9c000 - 000000003ff00000 (ACPI NVS)
[    0.000000] ACPI: RSDP 000F75D0, 0024 (r2 TOSQCI)
[    0.000000] ACPI: XSDT 3FE91FF6, 0074 (r1 TOSQCI TOSQCI00  6040000  LTP        0)
[    0.000000] ACPI: FACP 3FE9BC2A, 00F4 (r3 TOSQCI TOSQCI00  6040000 ALAN        1)
[    0.000000] ACPI: DSDT 3FE9305C, 8B5A (r1 TOSQCI   Denver  6040000 MSFT  3000001)
[    0.000000] ACPI: FACS 3FE9CFC0, 0040
[    0.000000] ACPI: APIC 3FE9BD1E, 0068 (r1 TOSQCI TOSQCI00  6040000 LOHR       5A)
[    0.000000] ACPI: HPET 3FE9BD86, 0038 (r1 TOSQCI TOSQCI00  6040000 LOHR       5A)
[    0.000000] ACPI: MCFG 3FE9BDBE, 003C (r1 TOSQCI TOSQCI00  6040000 LOHR       5A)
[    0.000000] ACPI: APIC 3FE9BDFA, 0068 (r1 PTLTD       APIC    6040000  LTP        0)
[    0.000000] ACPI: BOOT 3FE9BE62, 0028 (r1 PTLTD  $SBFTBL$  6040000  LTP        1)
[    0.000000] ACPI: SLIC 3FE9BE8A, 0176 (r1 TOSQCI TOSQCI00  6040000  LTP        0)
[    0.000000] ACPI: SSDT 3FE925F6, 025F (r1  PmRef  Cpu0Tst     3000 INTL 20060912)
[    0.000000] ACPI: SSDT 3FE92550, 00A6 (r1  PmRef  Cpu1Tst     3000 INTL 20060912)
[    0.000000] ACPI: SSDT 3FE9206A, 04E6 (r1  PmRef    CpuPm     3000 INTL 20060912)
[    0.000000] ACPI: BIOS bug: multiple APIC/MADT found, using 0
[    0.000000] ACPI: If "acpi_apic_instance=2" works better, notify <email address hidden>
[    0.000000] ACPI: PM-Timer IO Port: 0x1008
[    0.000000] ACPI: Local APIC address 0xfee00000
[    0.000000] ACPI: LAPIC (acpi_id[0x00] lapic_id[0x00] enabled)
[    0.000000] ACPI: LAPIC (acpi_id[0x01] lapic_id[0x01] enabled)
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x00] high edge lint[0x1])
[    0.000000] ACPI: LAPIC_NMI (acpi_id[0x01] high edge lint[0x1])
[    0.000000] ACPI: IOAPIC (id[0x01] address[0xfec00000] gsi_base[0])
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
[    0.000000] ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 high level)
[    0.000000] ACPI: IRQ0 used by override.
[    0.000000] ACPI: IRQ2 used by override.
[    0.000000] ACPI: IRQ9 used by override.
[    0.000000] ACPI: HPET id: 0x8086a201 base: 0xfed00000
[    0.000000] Using ACPI (MADT) for SMP configuration information
[   15.533321] ACPI: Core revision 20070126
[   15.533327] ACPI: Disabled _OSI(Linux)
[   15.533378] ACPI: Looking for DSDT in initramfs... successfully read 31955 bytes from /DSDT.aml.
[   15.533404] ACPI: Table DSDT replaced by host OS
[   15.533407] ACPI: DSDT 00000000, 7CD3 (r1 TOSQCI   Denver  6040000 INTL 20061109)
[   15.968847] ACPI: bus type pci registered
[   15.996680] ACPI: EC: Look up EC in DSDT
[   15.997381] ACPI: EC: GPE=0x17, ports=0x66, 0x62
[   16.075776] ACPI: Interpreter enabled
[   16.075779] ACPI: (supports S0 S3 S4 S5)
[   16.075795] ACPI: Using IOAPIC for interrupt routing
[   16.089927] ACPI: EC: GPE=0x17, ports=0x66, 0x62
[   16.089980] ACPI: PCI Root Bridge [PCI0] (0000:00)
[   16.090708] PCI quirk: region 1000-107f claimed by ICH6 ACPI/GPIO/TCO
[   16.092188] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0._PRT]
[   16.092478] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PEGP._PRT]
[   16.092611] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.RP01._PRT]
[   16.092740] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.RP02._PRT]
[   16.092868] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.RP03._PRT]
[   16.093010] ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PCIB._PRT]
[   16.101475] ACPI: PCI Interrupt Link [LNKA] (IRQs 1 3 4 5 6 7 10 12 14 15) *11
[   16.101588] ACPI: PCI Interrupt Link [LNKB] (IRQs 1 3 4 5 6 7 *11 12 14 15)
[   16.101690] ACPI: PCI Interrupt Link [LNKC] (IRQs 1 3 4 5 6 7 10 12 14 15) *11
[   16.101792] ACPI: PCI Interrupt Link [LNKD] (IRQs 1 3 4 5 6 7 *11 12 14 15)
[   16.101894] ACPI: PCI Interrupt Link [LNKE] (IRQs 1 3 4 5 6 7 10 12 14 15) *0, disabled.
[   16.101997] ACPI: PCI Interrupt Link [LNKF] (IRQs 1 3 4 5 6 7 11 12 14 15) *0, disabled.
[   16.102099] ACPI: PCI Interrupt Link [LNKG] (IRQs 1 3 4 5 6 7 10 12 14 15) *11
[   16.102201] ACPI: PCI Interrupt Link [LNKH] (IRQs 1 3 4 5 6 *7 11 12 14 15)
[   16.102342] pnp: PnP ACPI init
[   16.102350] ACPI: bus type pnp registered
[   16.104647] pnp: PnP ACPI: found 9 devices
[   16.104649] ACPI: ACPI bus type pnp unregistered
[   16.104653] PnPBIOS: Disabled by ACPI PNP
[   16.104696] PCI: Using ACPI for IRQ routing
[   16.168217] ACPI: PCI Interrupt 0000:00:01.0[A] -> GSI 16 (level, low) -> IRQ 16
[   16.168249] ACPI: PCI Interrupt 0000:00:1c.0[A] -> GSI 17 (level, low) -> IRQ 17
[   16.168283] ACPI: PCI Interrupt 0000:00:1c.1[B] -> GSI 16 (level, low) -> IRQ 16
[   16.168315] ACPI: PCI Interrupt 0000:00:1c.2[C] -> GSI 18 (level, low) -> IRQ 18
[   16.168360] ACPI: PCI Interrupt 0000:0a:04.0[A] -> GSI 17 (level, low) -> IRQ 17
[   26.464664] ACPI: SSDT 3FE92D9E, 01F6 (r1  PmRef  Cpu0Ist     3000 INTL 20060912)
[   26.464893] ACPI: SSDT 3FE92855, 04C4 (r1  PmRef  Cpu0Cst     3001 INTL 20060912)
[   26.465445] ACPI: CPU0 (power states: C1[C1] C2[C2] C3[C3])
[   26.465682] ACPI: SSDT 3FE92F94, 00C8 (r1  PmRef  Cpu1Ist     3000 INTL 20060912)
[   26.465896] ACPI: SSDT 3FE92D19, 0085 (r1  PmRef  Cpu1Cst     3000 INTL 20060912)
[   26.466465] ACPI: CPU1 (power states: C1[C1] C2[C2] C3[C3])
[   26.477111] ACPI: Thermal Zone [THRM] (51 C)
[   11.888000] ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 19
[   12.556000] ACPI: PCI Interrupt 0000:00:1d.0[A] -> GSI 23 (level, low) -> IRQ 20
[   12.660000] ACPI: PCI Interrupt 0000:00:1d.1[B] -> GSI 19 (level, low) -> IRQ 19
[   12.764000] ACPI: PCI Interrupt 0000:00:1d.2[C] -> GSI 18 (level, low) -> IRQ 18
[   12.868000] ACPI: PCI Interrupt 0000:00:1d.3[D] -> GSI 16 (level, low) -> IRQ 16
[   12.976000] ACPI: PCI Interrupt 0000:02:00.0[A] -> GSI 16 (level, low) -> IRQ 16
[   13.108000] ACPI: PCI Interrupt 0000:0a:04.1[A] -> GSI 17 (level, low) -> IRQ 17
[   13.108000] ACPI: PCI Interrupt 0000:00:1d.7[A] -> GSI 23 (level, low) -> IRQ 20
[   23.052000] ACPI: PCI Interrupt 0000:0a:04.2[A] -> GSI 17 (level, low) -> IRQ 17
[   23.488000] ACPI: PCI Interrupt 0000:0a:04.3[A] -> GSI 17 (level, low) -> IRQ 17
[   23.496000] ACPI: PCI Interrupt 0000:01:00.0[A] -> GSI 16 (level, low) -> IRQ 16
[   23.516000] ACPI: PCI Interrupt 0000:03:00.0[A] -> GSI 17 (level, low) -> IRQ 17
[   23.772000] ACPI: PCI Interrupt 0000:00:1b.0[A] -> GSI 22 (level, low) -> IRQ 21
[   26.044000] ACPI: AC Adapter [ACAD] (on-line)
[   26.076000] ACPI: Video Device [VGA] (multi-head: yes  rom: no  post: no)
[   26.172000] ACPI: Power Button (FF) [PWRF]
[   26.172000] ACPI: Lid Switch [LID]
[   26.200000] ACPI: Power Button (CM) [PWRB]
[   26.336000] ACPI: Battery Slot [BAT1] (battery present)

I'm happy to test patches!